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논문 기본 정보

자료유형
학술저널
저자정보
Zeng, Zhi-Ping (School of Civil Engineering, Railway Campus, Central South University) He, Xian-Feng (School of Civil Engineering, Railway Campus, Central South University) Zhao, Yan-Gang (School of Civil Engineering, Railway Campus, Central South University) Yu, Zhi-Wu (School of Civil Engineering, Railway Campus, Central South University) Chen, Ling-Kun (National Engineering Laboratory for High-Speed Railway Construction, Central South University) Xu, Wen-Tao (National Engineering Laboratory for High-Speed Railway Construction, Central South University) Lou, Ping (School of Civil Engineering, Railway Campus, Central South University)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제54권 제5호
발행연도
2015.1
수록면
1,017 - 1,044 (28page)

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This study aimed to investigate the random vibration characteristic of train-slab track-bridge interaction system subjected to both track irregularities and earthquakes by use of pseudo-excitation method (PEM). Each vehicle subsystem was modeled by multibody dynamics. A three-dimensional rail-slab- girder-pier finite element model was created to simulate slab track and bridge subsystem. The equations of motion for the entire system were established based on the constraint condition of no jump between wheel and rail. The random load vectors of equations of motion were formulated by transforming track irregularities and seismic accelerations into a series of deterministic pseudo-excitations according to their respective power spectral density (PSD) functions by means of PEM. The time-dependent PSDs of random vibration responses of the system were obtained by step-by-step integration method, and the corresponding extreme values were estimated based on the first-passage failure criterion. As a case study, an ICE3 high-speed train passing a fifteen-span simply supported girder bridge simultaneously excited by track irregularities and earthquakes is presented. The evaluated extreme values and the PSD characteristic of the random vibration responses of bridge and train are analyzed, and the influences of train speed and track irregularities (without earthquakes) on the random vibration characteristic of bridge and train are discussed.

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